Research On An Integrated Optics Interferometric Imaging Technology

The improvement of the space optical system is in the direction of large field of view,high image quality and small volume.The combination of integrated optics technology and interferometric imaging technology can reduce the size and weight of the imaging system while ensuring high image quality.In 2012,Lockheed Martin proposed an imaging system of Segmented Planar Imaging Detector for Electro-optical Reconnaissance(SPIDER),based on photonic integrated circuit(PIC),which is called the “spider web” photoelectric detection imaging system.It utilizes lenslets array to coherently sample the spatial frequency of the target,and then restore the image by inverse Fourier transform,which can reduce the size,weight and power of the imaging system by at least an order of magnitude.However,the “spider web” photoelectric detection imaging system has the shortage of the lack of spatial frequency sampling,which results in poor imaging quality.A “checkerboard” photoelectric detection imaging system was proposed in this paper,which achieves all the integer times of fundamental frequency sampling within cutoff frequency including zero frequency through a compact rectangular aperture arrangement,resulting in good imaging quality.In addition,a wide-area detection and tracking imaging system based on this imaging technology was proposed,which provides a solution for multi targets simultaneous detection and tracking.The main work and innovations are as follows:(1)Based on the principle of interference and the Van-Cittert Zernike theorem,the optical field transmission,interference signal processing and system imaging characteristics of integrated optics interferometric imaging technology: spatial frequency sampling,resolution,field of view and single detector photosensor collected energy were described in detail.In addition,the imaging characteristics of integrated optics interferometric imaging technology and traditional single aperture imaging technology were compared.(2)A simulation platform was built by MATLAB to realize the imaging process simulation and imaging quality evaluation of integrated optics interferometric imaging technology.Through this platform,a quantitative comparison of imaging effects between integrated optics interferometric imaging technology and traditional single aperture imaging technology was performed,demonstrating the imaging advantages of integrated optics interferometric imaging technology.(3)In order to solve the problem of the lack of spatial frequency sampling of “spider web” photoelectric detection imaging system,a “checkboard” photoelectric detection imaging system with compact rectangular lenslets arrangement was proposed,which can achieve all the integer times of fundamental frequency sampling within cutoff frequency including zero frequency,resulting in good imaging quality.The simulation platform verified that the imaging effect of the integrated optics interferometric imaging technology is better than the traditional single aperture imaging technology at the same system diameter.(4)To solve the problem of multi cameras matching of multi targets detection and tracking system based on the traditional single aperture imaging technology,a wide-area detection and tracking imaging system based on the integrated optics interferometric imaging was designed.The system can achieve multi targets simultaneously high resolution detection and tracking imaging without any moving parts.